`backend/app/worldstate/engine.py` held 918 lines covering four separate jobs:
reading a scenario's schema, parsing the block the model writes, applying a
change within the schema's limits, and rendering state as prompt text. Each is
now its own module, the largest 418 lines.
An AST comparison against the old file confirms all 29 definitions are
identical. No call site changes, because `worldstate/__init__.py` exports the
same names it did before.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014Dix4oGV3njgWRdu7P9t6r
